The young cast set to play the von Trapp children are Ariane Rinehart (Liesl), Michael Nigro (Fredrich), Ella Watts-Gorman (Louisa), Joe West (Kurt), Sophia Caruso (Brigitta), Grace Rundhaug (Marta) and Peyton Ella as young Gretl.

The live TV version of the Richard Rodgers and Oscar Hammerstein II musical is based on the original 1959 Broadway production of The Sound of Music, starring Mary Martin and Theodore Bikel, with a book by Howard Lindsay and Russel Crouse. The iconic story, according to NBC, "centers on a young woman who leaves an Austrian convent to become a governess to the seven children of a naval officer widower."